1 # SPDX-License-Identifier: GPL-2.0 1 # SPDX-License-Identifier: GPL-2.0
2 # 2 #
3 # Makefile for the linux kernel signature chec 3 # Makefile for the linux kernel signature checking certificates.
4 # 4 #
5 5
6 obj-$(CONFIG_SYSTEM_TRUSTED_KEYRING) += system 6 obj-$(CONFIG_SYSTEM_TRUSTED_KEYRING) += system_keyring.o system_certificates.o
7 obj-$(CONFIG_SYSTEM_BLACKLIST_KEYRING) += blac 7 obj-$(CONFIG_SYSTEM_BLACKLIST_KEYRING) += blacklist.o blacklist_hashes.o
8 obj-$(CONFIG_SYSTEM_REVOCATION_LIST) += revoca 8 obj-$(CONFIG_SYSTEM_REVOCATION_LIST) += revocation_certificates.o
9 9
10 $(obj)/blacklist_hashes.o: $(obj)/blacklist_ha 10 $(obj)/blacklist_hashes.o: $(obj)/blacklist_hash_list
11 CFLAGS_blacklist_hashes.o := -I $(obj) 11 CFLAGS_blacklist_hashes.o := -I $(obj)
12 12
13 quiet_cmd_check_and_copy_blacklist_hash_list = 13 quiet_cmd_check_and_copy_blacklist_hash_list = GEN $@
14 cmd_check_and_copy_blacklist_hash_list = 14 cmd_check_and_copy_blacklist_hash_list = \
15 $(if $(CONFIG_SYSTEM_BLACKLIST_HASH_LI 15 $(if $(CONFIG_SYSTEM_BLACKLIST_HASH_LIST), \
16 $(AWK) -f $(src)/check-blacklist-hashe 16 $(AWK) -f $(src)/check-blacklist-hashes.awk $(CONFIG_SYSTEM_BLACKLIST_HASH_LIST) >&2; \
17 { cat $(CONFIG_SYSTEM_BLACKLIST_HASH_L 17 { cat $(CONFIG_SYSTEM_BLACKLIST_HASH_LIST); echo $(comma) NULL; } > $@, \
18 echo NULL > $@) 18 echo NULL > $@)
19 19
20 $(obj)/blacklist_hash_list: $(CONFIG_SYSTEM_BL 20 $(obj)/blacklist_hash_list: $(CONFIG_SYSTEM_BLACKLIST_HASH_LIST) FORCE
21 $(call if_changed,check_and_copy_black 21 $(call if_changed,check_and_copy_blacklist_hash_list)
22 22
23 targets += blacklist_hash_list 23 targets += blacklist_hash_list
24 24
25 quiet_cmd_extract_certs = CERT $@ 25 quiet_cmd_extract_certs = CERT $@
26 cmd_extract_certs = $(obj)/extract-cert 26 cmd_extract_certs = $(obj)/extract-cert "$(extract-cert-in)" $@
27 extract-cert-in = $(filter-out $(obj)/extract- 27 extract-cert-in = $(filter-out $(obj)/extract-cert, $(real-prereqs))
28 28
29 $(obj)/system_certificates.o: $(obj)/x509_cert 29 $(obj)/system_certificates.o: $(obj)/x509_certificate_list
30 30
31 $(obj)/x509_certificate_list: $(CONFIG_SYSTEM_ 31 $(obj)/x509_certificate_list: $(CONFIG_SYSTEM_TRUSTED_KEYS) $(obj)/extract-cert FORCE
32 $(call if_changed,extract_certs) 32 $(call if_changed,extract_certs)
33 33
34 targets += x509_certificate_list 34 targets += x509_certificate_list
35 35
36 # If module signing is requested, say by allye 36 # If module signing is requested, say by allyesconfig, but a key has not been
37 # supplied, then one will need to be generated 37 # supplied, then one will need to be generated to make sure the build does not
38 # fail and that the kernel may be used afterwa 38 # fail and that the kernel may be used afterwards.
39 # 39 #
40 # We do it this way rather than having a boole 40 # We do it this way rather than having a boolean option for enabling an
41 # external private key, because 'make randconf 41 # external private key, because 'make randconfig' might enable such a
42 # boolean option and we unfortunately can't ma 42 # boolean option and we unfortunately can't make it depend on !RANDCONFIG.
43 ifeq ($(CONFIG_MODULE_SIG_KEY),certs/signing_k 43 ifeq ($(CONFIG_MODULE_SIG_KEY),certs/signing_key.pem)
44 44
45 keytype-$(CONFIG_MODULE_SIG_KEY_TYPE_ECDSA) := 45 keytype-$(CONFIG_MODULE_SIG_KEY_TYPE_ECDSA) := -newkey ec -pkeyopt ec_paramgen_curve:secp384r1
46 46
47 quiet_cmd_gen_key = GENKEY $@ 47 quiet_cmd_gen_key = GENKEY $@
48 cmd_gen_key = openssl req -new -nodes -u 48 cmd_gen_key = openssl req -new -nodes -utf8 -$(CONFIG_MODULE_SIG_HASH) -days 36500 \
49 -batch -x509 -config $< \ 49 -batch -x509 -config $< \
50 -outform PEM -out $@ -keyout $ 50 -outform PEM -out $@ -keyout $@ $(keytype-y) 2>&1
51 51
52 $(obj)/signing_key.pem: $(obj)/x509.genkey FOR 52 $(obj)/signing_key.pem: $(obj)/x509.genkey FORCE
53 $(call if_changed,gen_key) 53 $(call if_changed,gen_key)
54 54
55 targets += signing_key.pem 55 targets += signing_key.pem
56 56
57 quiet_cmd_copy_x509_config = COPY $@ 57 quiet_cmd_copy_x509_config = COPY $@
58 cmd_copy_x509_config = cat $(src)/defaul 58 cmd_copy_x509_config = cat $(src)/default_x509.genkey > $@
59 59
60 # You can provide your own config file. If not 60 # You can provide your own config file. If not present, copy the default one.
61 $(obj)/x509.genkey: 61 $(obj)/x509.genkey:
62 $(call cmd,copy_x509_config) 62 $(call cmd,copy_x509_config)
63 63
64 endif # CONFIG_MODULE_SIG_KEY 64 endif # CONFIG_MODULE_SIG_KEY
65 65
66 $(obj)/system_certificates.o: $(obj)/signing_k 66 $(obj)/system_certificates.o: $(obj)/signing_key.x509
67 67
68 PKCS11_URI := $(filter pkcs11:%, $(CONFIG_MODU 68 PKCS11_URI := $(filter pkcs11:%, $(CONFIG_MODULE_SIG_KEY))
69 ifdef PKCS11_URI 69 ifdef PKCS11_URI
70 $(obj)/signing_key.x509: extract-cert-in := $( 70 $(obj)/signing_key.x509: extract-cert-in := $(PKCS11_URI)
71 endif 71 endif
72 72
73 $(obj)/signing_key.x509: $(filter-out $(PKCS11 73 $(obj)/signing_key.x509: $(filter-out $(PKCS11_URI),$(CONFIG_MODULE_SIG_KEY)) $(obj)/extract-cert FORCE
74 $(call if_changed,extract_certs) 74 $(call if_changed,extract_certs)
75 75
76 targets += signing_key.x509 76 targets += signing_key.x509
77 77
78 $(obj)/revocation_certificates.o: $(obj)/x509_ 78 $(obj)/revocation_certificates.o: $(obj)/x509_revocation_list
79 79
80 $(obj)/x509_revocation_list: $(CONFIG_SYSTEM_R 80 $(obj)/x509_revocation_list: $(CONFIG_SYSTEM_REVOCATION_KEYS) $(obj)/extract-cert FORCE
81 $(call if_changed,extract_certs) 81 $(call if_changed,extract_certs)
82 82
83 targets += x509_revocation_list 83 targets += x509_revocation_list
84 84
85 hostprogs := extract-cert 85 hostprogs := extract-cert
86 86
87 HOSTCFLAGS_extract-cert.o = $(shell $(HOSTPKG_ 87 HOSTCFLAGS_extract-cert.o = $(shell $(HOSTPKG_CONFIG) --cflags libcrypto 2> /dev/null) -I$(srctree)/scripts
88 HOSTLDLIBS_extract-cert = $(shell $(HOSTPKG_CO 88 HOSTLDLIBS_extract-cert = $(shell $(HOSTPKG_CONFIG) --libs libcrypto 2> /dev/null || echo -lcrypto)
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